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Air mass flow sensor tuning

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Old 11-03-2012, 11:48 AM
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max3.2
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Default Air mass flow sensor tuning

Someone having experience with it? Running a prim. bypass and will be doing small cat,too.
They're offering air mass flow sensor+larger throttle bodies+chip setup for 1800 around here, claiming a 10% (early rpm) increase in torque and 30 to 50hp (with cat and prim bypass and k&n filter) compared to bare stock...
Old 11-03-2012, 12:28 PM
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crg53
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My uninformed opinion is " If it sounds too good to be true......"
You may be able to attain such gains, on an otherwise stock engine, with the installation of Motec, but with just AFM, Chip and a filter, I doubt you will see those numbers.

Old 11-03-2012, 02:56 PM
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max3.2
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Originally Posted by crg53
... with the installation of Motec...
Motec? Don't know what you mean with that, sorry..could you explain further ?
Old 11-03-2012, 05:55 PM
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crg53
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MoteC is an advanced engine management system, which enables you to tune the engine for maximum performance for its configuration.
www.motec.com
There are several Porsche experts on this forum who are well versed in these systems.
In no particular order:
www.rennsportsystems.com
www.ninemeister.com
http://www.racetek-engineering.com

Old 11-03-2012, 07:09 PM
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FeralComprehension
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I'd be wanting dyno verified results before I believed that; if the AFM was a bottleneck it would have been known long ago and discussed ad infinitum.
Old 11-03-2012, 07:32 PM
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dlpalumbo
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Vitesse has charts showing 19 rwhp gain, and 14 ft-lb torque for 964.
Old 11-04-2012, 09:23 AM
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koenig_roland
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@max,
i think you´re interested in the cartronic LM220 kit?!

Me too, but i can´t realy believe the said performance-numbers.
But, i´ve you search for meanings of LM220-users in german forums, there is some positive feedback, but also some bad (or not realy good) response.

The throttle body is a mystic part, too.

I think it isn´t the bottleneck. An other solution could be the maf-kit from dme24.de for round about ~800,-€ and an custom dyno-mapping...

regards from munich
Old 11-04-2012, 04:45 PM
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The support bracket attachment is completely half-assed:

Old 11-04-2012, 05:28 PM
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Steve Weiner-Rennsport Systems
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Based on experience, I don't believe their dyno numbers either.

JMHO, but if one wants to install a MAFS, Engine Management Systems such as Motec is mandatory to make the car run properly and get the benefits. The power gains are modest with a stock engine, however the throttle response really improves IF the programming is done right. The "devil is very much in the details".

Further, MAFS systems are very sensitive about plumbing and simply clamping an air filter to the housing costs performance.

BTDT on all this,....
Old 11-05-2012, 05:23 AM
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@roland: yes, looking at catronics...

at least the ones installed at catronic seem to run well. that coincide with steve's response: if you set it up right, it gives you "something". well if that seomething is worth $2000? i don't know yet....

PS: thanks again steve for pointing me to (and selling :P) RS sway bars alsmost a year ago just drove a C2 without them and yes, it is a difference )
Old 11-05-2012, 08:31 AM
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koenig_roland
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on saturday, i had just a conversation with an 964 owner with MAF and this guy was overwhelming positive about the LM220 with fabulous numbers...
Old 11-05-2012, 02:06 PM
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Originally Posted by Steve Weiner-Rennsport Systems
Based on experience, I don't believe their dyno numbers either.

JMHO, but if one wants to install a MAFS, Engine Management Systems such as Motec is mandatory to make the car run properly and get the benefits. The power gains are modest with a stock engine, however the throttle response really improves IF the programming is done right. The "devil is very much in the details".

Further, MAFS systems are very sensitive about plumbing and simply clamping an air filter to the housing costs performance.

BTDT on all this,....
+1. Do a search. Steve, the Ninemeister, and LorenB have been very generous about sharing the benefit of long experience. None of them sell bolt-on MAF quick fixes because they understand they will not improve over the factory AFM without significant additional investment. LorenB has pointed out many times that a re-map works only because the factory tune accomodates 91 octane fuel. If you have a reliable supply of 93 octane, changing the DME map gives an inexpensive 2 - 5 HP gain. If you want 20 - 50 HP, we are talking bank-loan levels of investment.
Old 11-05-2012, 02:47 PM
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Atgani
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Mine's been dynoed on three different rolling roads over the past nine years.It's showed between 299 and 301 fwhp on every occasion. It appeared to be runing a standard cat too.
I've just fitted a Dansk de-cat to it, will most likely RR it again and have the fuelling adjusted to compensate for the less restricted exhaust.
Old 11-05-2012, 05:27 PM
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Originally Posted by Atgani
Mine's been dynoed on three different rolling roads over the past nine years.It's showed between 299 and 301 fwhp on every occasion. It appeared to be runing a standard cat too.
I've just fitted a Dansk de-cat to it, will most likely RR it again and have the fuelling adjusted to compensate for the less restricted exhaust.
with or without MAF?
Old 11-06-2012, 08:50 PM
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I had the SplitSec MAF 3.5 Kit - P installed about a month ago with a K&N filter and custom dyno tune. No flat spots & instant throttle response. It has transformed the way the car drives. Good for 320hp. A fan!


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